10121918659 has 6 divisors (see below), whose sum is σ = 10655112860. Its totient is φ = 9588770640.

The previous prime is 10121918617. The next prime is 10121918699. The reversal of 10121918659 is 95681912101.

It is not a de Polignac number, because 10121918659 - 2²¹ = 10119821507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121918699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 426999 + ... + 450079.

Almost surely, 2^10121918659 is an apocalyptic number.

10121918659 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10121918659 is a deficient number, since it is larger than the sum of its proper divisors (533194201).

10121918659 is an frugal number, since it uses more digits than its factorization.

10121918659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46181 (or 23100 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 43.

The spelling of 10121918659 in words is "ten billion, one hundred twenty-one million, nine hundred eighteen thousand, six hundred fifty-nine".